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A centrifuge rotor rotating at 11000 rpm is shut off and is eventually brought uniformly to rest by a frictional torque of 1.92 m\cdot N. If the mass of the rotor is 6.41 kg and it can be approximated as a solid cylinder of radius 0.0590 m, through how many revolutions will the rotor turn before coming to rest?
A beam of protons at an accelerator creates a current of 164uA. If the beam is focused on a target, how many protons strike the target in 60.0s
A car is towing a boat on a trailer. The driver starts from rest and accelerates to a velocity of +16.6 m/s in a time of 34.3 s, What is the tension in the hitch that connects the trailer to the car
Two people (one having a mass of 40 kg and the other having a mass of 60 kg) stand at one end of a small uniform boat of mass 100 kg and length 20 m. Determine how far the boat moves in the process assuming no friction between the boat and the wate..
A 3.4-m-tall, 40-cm-diameter concrete column supports a 2.0×105kg load, By how much is the column compressed
A nuclear power plant has a reactor that produces heat at the rate of870MW. This heat is used to produce260MW of mechanical power to drive an electricalgenerator. What is the thermal efficiency of the plant
A projectile is fired from the surface of the Earth with a speed of 200 meters per second at an angle of 30 degress above the horizantal. If the ground is level, illustrate what is the maximum height reached by the projectile?
Give examples of two objects that have different positions but undergo identical displacements. Please give another or a couple of examples other than a group of choreographed stage dancers.
The coefficient of kinetic friction between a refrigerator (mass 100kg) and the floor is 0.20, and the coefficient of static friction is 0.25. If you apply the minimum force needed to get the refrigerator to move, what will the acceleration be?
A bumper car with mass m1 = 115kg is moving to the right with a velocity of v1 = 4 m/s. A second bumper car with mass m2 = 95 kg is moving to the left with a velocity of v2 = -3.7 m/s. The two cars have an elastic collision. Suppose the surface is fr..
A 2,493-kg car is moving down a road with a slope (grade) of 14% at a constant speed of 13 m/s. What is the direction and magnitude of the frictional force?
A 2.0 kg mass is projected from the edge of the top of a 20mtall building with a velocity of 24m/s at some unknown angle abovethe horizontal. find the kinetic energy of the mass just before it strikes the ground
Find the magnetic field at P and P' on the axis of a circular coil of radius a = 20.7 cm (see figure below). The coil consists of 10 turns of wire carrying a current of 4.07 A in the direction indicated. (Hint: the magnetic field on the axis of a ..
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